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Biomedical Engineering Letters

, Volume 7, Issue 4, pp 273–279 | Cite as

Spectrum analysis for assessing red blood cell aggregation using high-frequency ultrasound array transducer

  • Changhan Yoon
Original Article
  • 179 Downloads

Abstract

The purpose of this study is to investigate a spectrum analysis technique for detecting and monitoring red blood cell (RBC) aggregation using a high-frequency array transducer. To assess the feasibility of this approach, the backscattered radio-frequency signal from non-aggregated and aggregated RBC samples with two hematocrit levels were acquired by using a 30-MHz linear array transducer and analyzed in frequency domain. Three parameters such as spectral slope, midband fit and Y intercept were extracted in a static condition. Fresh porcine blood was used and degrees of aggregation were changed by diluting plasma concentration. From the experiments, it was demonstrated that the spectral slope related to a size of scatterer progressively declined as the level of aggregation increased; its mean values at hematocrit of 40% were 1.10 and −0.22 dB/MHz for RBCs suspended in isotonic phosphate buffered saline and solution with 70% plasma concentrations, respectively. For the midband fit and Y intercept, the mean values were increased by 9.1 and 46.4 dB, respectively. These results indicated that the spectrum analysis technique is useful for monitoring RBC aggregation and can be potentially developed for assessing aggregation in clinical applications.

Keywords

Spectrum analysis High-frequency ultrasound Red blood cell aggregation Array transducer 

Notes

Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP; Ministry of Science, ICT & Future Planning) (No. 2017R1C1B5016846).

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Copyright information

© Korean Society of Medical and Biological Engineering and Springer 2017

Authors and Affiliations

  1. 1.Department of Biomedical EngineeringInje UniversityGimhaeRepublic of Korea

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